| 摘要 |
PURPOSE:To execute a sufficient epidark illumination even in case of an objective lens having a large aperture with simple constitution, by providing a ring- shaped hollow lens member of a negative refractive power between a ring- shaped condensing member of an epidark objective lens and an incident light side end of the objective lens. CONSTITUTION:A ring-shaped illuminating light supplied from a light source is reflected by a hole-opening reflecting mirror 12 provided diagonally in a microscope body and travels toward an objective lens 10. Subsequently, it is diverged by a ring-shaped lens member 1 of a negative refractive power provided in an objective lens barrel 11 in the vicinity of an incident light side end of the objective lens 10, and led to an object surface O by a ring-shaped concave surface reflecting mirror 2 being a ring-shaped condensing member provided in the vicinity of the tip of the objective lens 10. |
